add documentation builder

docs/requirements.txt

@@ -0,0 +1,22 @@
+click==8.1.3
+ghp-import==2.1.0
+importlib-metadata==4.12.0
+Jinja2==3.1.2
+Markdown==3.3.7
+markdown-include==0.6.0
+MarkupSafe==2.1.1
+mergedeep==1.3.4
+mkdocs==1.3.0
+mkdocs-bootswatch==1.1
+mkdocs-material==8.1.8
+mkdocs-material-extensions==1.0.3
+packaging==21.3
+Pygments==2.11.2
+pymdown-extensions==9.1
+pyparsing==3.0.9
+python-dateutil==2.8.2
+PyYAML==6.0
+pyyaml_env_tag==0.1
+six==1.16.0
+watchdog==2.1.9
+zipp==3.8.0